Kahalu‘u Weather in September

The climate in Kahalu‘u during September can be summarized as hot and wet.

September is in the fall / autumn in Kahalu‘u and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a warm 30°C (86°F), whilst at night 22°C (71°F) is normal.

On average September is the 2nd driest month of the year in Kahalu‘u with around 166mm 6.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.5 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Kahalu‘u in September 2025.